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Commit a7a1ad90 authored by Mark Brown's avatar Mark Brown Committed by Liam Girdwood
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regulator: Add regulator voltage range check API 



Simplify checking of support for voltage ranges by providing an API which
wraps the existing count and list operations.

Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
parent 5ffbd136

drivers/regulator/core.c

+29 −0
Original line number Diff line number Diff line
@@ -1441,6 +1441,35 @@ int regulator_list_voltage(struct regulator *regulator, unsigned selector) 
}

EXPORT_SYMBOL_GPL(regulator_list_voltage);



/**

 * regulator_is_supported_voltage - check if a voltage range can be supported

 *

 * @regulator: Regulator to check.

 * @min_uV: Minimum required voltage in uV.

 * @max_uV: Maximum required voltage in uV.

 *

 * Returns a boolean or a negative error code.

 */

int regulator_is_supported_voltage(struct regulator *regulator,

				   int min_uV, int max_uV)

{

	int i, voltages, ret;



	ret = regulator_count_voltages(regulator);

	if (ret < 0)

		return ret;

	voltages = ret;



	for (i = 0; i < voltages; i++) {

		ret = regulator_list_voltage(regulator, i);



		if (ret >= min_uV && ret <= max_uV)

			return 1;

	}



	return 0;

}



/**

 * regulator_set_voltage - set regulator output voltage

 * @regulator: regulator source

include/linux/regulator/consumer.h

+2 −0
Original line number Diff line number Diff line
@@ -146,6 +146,8 @@ void regulator_bulk_free(int num_consumers, 


int regulator_count_voltages(struct regulator *regulator);

int regulator_list_voltage(struct regulator *regulator, unsigned selector);

int regulator_is_supported_voltage(struct regulator *regulator,

				   int min_uV, int max_uV);

int regulator_set_voltage(struct regulator *regulator, int min_uV, int max_uV);

int regulator_get_voltage(struct regulator *regulator);

int regulator_set_current_limit(struct regulator *regulator,